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DEBT AND FINANCING ARRANGEMENTS - Additional Information (Detail) £ in Millions, CAD in Millions |  |  |  |  |  |  |  | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 30, 2017 USD ($) | Nov. 09, 2017 USD ($) | Nov. 08, 2017 USD ($) | Oct. 01, 2017 USD ($) | May 18, 2017 USD ($) | May 16, 2017 USD ($) | Nov. 30, 2015 | Dec. 31, 2017 USD ($) Credit_Agreements | Mar. 31, 2017 USD ($) | Dec. 31, 2017 USD ($) Tranches Credit_Agreements | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2017 GBP (£) Credit_Agreements | Dec. 31, 2017 EUR (€) Credit_Agreements | Nov. 08, 2017 EUR (€) | May 18, 2017 CAD | Sep. 30, 2015 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | $ 24,761,000,000 |  | $ 24,761,000,000 |  |  |  |  |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | 24,289,000,000 |  | $ 24,289,000,000 | $ 16,075,000,000 |  |  |  |  |  |
Number of tranches in debt instrument | Tranches |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |
Repayments of long-term borrowings |  |  |  |  |  |  |  |  |  | $ 3,939,000,000 | 3,805,000,000 | $ 2,724,000,000 |  |  |  |  |
Rent expense related to operating leases |  |  |  |  |  |  |  |  |  | 804,000,000 | 686,000,000 | $ 669,000,000 |  |  |  |  |
Outstanding letters of credit |  |  |  |  |  |  |  | 1,084,000,000 |  | 1,084,000,000 |  |  |  |  |  |  |
Surety bonds written |  |  |  |  |  |  |  | $ 932,000,000 |  | $ 932,000,000 |  |  |  |  |  |  |
Number of credit agreements | Credit_Agreements |  |  |  |  |  |  |  | 2 |  | 2 |  |  | 2 | 2 |  |  |
Covenants limit the amount of secured indebtedness that we may incur, and limit the amount of attributable debt in sale-leaseback transactions, to percentage of net tangible assets |  |  |  |  |  |  |  | 10.00% |  | 10.00% |  |  | 10.00% | 10.00% |  |  |
Covenants limit the amount of secured indebtedness that we may incur, and limit the amount of attributable debt in sale-leaseback transactions, net tangible assets amount |  |  |  |  |  |  |  | $ 2,686,000,000 |  | $ 2,686,000,000 |  |  |  |  |  |  |
Long-term debt fair value |  |  |  |  |  |  |  | 0 |  | 0 | $ 17,134,000,000 |  |  |  |  |  |
Long-term Debt |  |  |  |  |  |  |  | $ 23,886,000,000 |  | $ 23,886,000,000 |  |  |  |  |  |  |
8.375% Debentures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  |  |  |  |  |  |  | 837.50% |  | 837.50% |  |  | 837.50% | 837.50% |  |  |
8.375% debentures Due 2030 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Original debt amount |  |  |  |  |  |  |  |  |  | $ 276,000,000 |  |  |  |  |  |  |
Debt instrument redemption price |  |  |  |  |  |  |  | 100.00% |  | 100.00% |  |  | 100.00% | 100.00% |  |  |
8.375% debentures Due 2030 | Until April 1, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  |  |  |  |  |  |  | 8.375% |  | 8.375% |  |  | 8.375% | 8.375% |  |  |
8.375% debentures Due 2030 | After April 1, 2020 for the Final 10 Years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  |  |  |  |  |  |  | 7.62% |  | 7.62% |  |  | 7.62% | 7.62% |  |  |
Debt instrument, period that interest rate is reduced to 7.62% |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |  |  |
8.375% debentures Due 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt not subject to early redemption |  |  |  |  |  |  |  | $ 424,000,000 |  | $ 424,000,000 |  |  |  |  |  |  |
Derivative, average swaption interest rate |  |  |  |  |  |  |  | 5.95% |  | 5.95% | 5.43% |  | 5.95% | 5.95% |  |  |
Floating rate senior notes maturing 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  |  |  |  |  |  |  | 0.45% |  |  |  |  |  |  |  |  |
Facility Notes and Bonds Worldport Louisville |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average interest rate |  |  |  |  |  |  |  |  |  | 0.83% | 0.37% |  |  |  |  |  |
Principal Balance |  |  |  |  |  |  |  | $ 149,000,000 |  | $ 149,000,000 |  |  |  |  |  |  |
Facility Notes and Bonds Airfreight Louisville |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average interest rate |  |  |  |  |  |  |  |  |  | 0.80% | 0.36% |  |  |  |  |  |
Principal Balance |  |  |  |  |  |  |  | 42,000,000 |  | $ 42,000,000 |  |  |  |  |  |  |
Facility Notes and Bonds International Airport Dallas Fort Worth |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal Balance |  |  |  |  |  |  |  | $ 29,000,000 |  | $ 29,000,000 |  |  |  |  |  |  |
Fixed interest rate |  |  |  |  |  |  |  | 5.11% |  | 5.11% |  |  | 5.11% | 5.11% |  |  |
Facility Notes and Bonds, Delaware County, Pennsylvania Industrial Development Authority, Due September 2045 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average interest rate |  |  |  |  |  |  |  |  |  | 0.78% | 0.40% |  |  |  |  |  |
Principal Balance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,000,000
5.50% Pound Sterling Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of tranches in debt instrument | Tranches |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |
Pound Sterling notes not exchanged | £ |  |  |  |  |  |  |  |  |  |  |  |  | £ 66 |  |  |  |
5.50% senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  |  |  |  |  |  |  | 5.50% |  | 5.50% |  |  | 5.50% | 5.50% |  |  |
5.13% Pound Sterling Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average interest rate |  |  |  |  |  |  |  |  |  | 5.125% |  |  |  |  |  |  |
Pound Sterling notes not exchanged | £ |  |  |  |  |  |  |  |  |  |  |  |  | £ 455 |  |  |  |
Redemption price description |  |  |  |  |  |  |  |  |  | These notes are callable at our option at a redemption price equal to the greater of 100% of the principal amount and accrued interest, or the sum of the present values of the remaining scheduled payout of principal and interest thereon discounted to the date of redemption at a benchmark U.K. government bond yield plus 15 basis points and accrued interest. |  |  |  |  |  |  |
Revolving credit facility expiring in 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving credit facilities |  |  |  |  |  |  |  | $ 1,500,000,000.0 |  | $ 1,500,000,000.0 |  |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Mar. 23, 2018 |  |  |  |  |  |  |
Revolving credit facility expiring in 2014 | Federal funds effective rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  |  |  |  |  |  |  |  |  | 0.50% |  |  |  |  |  |  |
Revolving credit facility expiring in 2014 | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  |  |  |  |  |  |  |  |  | 1.00% |  |  |  |  |  |  |
Revolving credit facility expiring in 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving credit facilities |  |  |  |  |  |  |  | 3,000,000,000.0 |  | $ 3,000,000,000.0 |  |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Mar. 24, 2022 |  |  |  |  |  |  |
Applicable margin for base rate below LIBOR |  |  |  |  |  |  |  |  |  | 1.00% |  |  |  |  |  |  |
Revolving credit facility expiring in 2018 | Federal funds effective rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  |  |  |  |  |  |  |  |  | 0.50% |  |  |  |  |  |  |
Revolving credit facility expiring in 2018 | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  |  |  |  |  |  |  |  |  | 1.00% |  |  |  |  |  |  |
Revolving credit facility expiring in 2018 | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin for base rate below LIBOR |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |
LIBOR [Member] | Revolving credit facility expiring in 2014 | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  |  |  |  |  |  |  |  |  | 0.75% |  |  |  |  |  |  |
LIBOR [Member] | Revolving credit facility expiring in 2014 | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Credit Default Swap Spread, Term |  |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |  |
Applicable margin rates |  |  |  |  |  |  |  |  |  | 0.10% |  |  |  |  |  |  |
LIBOR [Member] | Revolving credit facility expiring in 2018 | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  |  |  |  |  |  |  |  |  | 0.10% |  |  |  |  |  |  |
Citibank base rate [Member] | Revolving credit facility expiring in 2014 | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  |  |  |  |  |  |  |  |  | 1.00% |  |  |  |  |  |  |
Citibank base rate [Member] | Revolving credit facility expiring in 2014 | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |
Citibank base rate [Member] | Revolving credit facility expiring in 2018 | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  |  |  |  |  |  |  |  |  | 0.75% |  |  |  |  |  |  |
Canadian Senior Notes | 2.125% canadian senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  | $ 547,000,000 |  |  | $ 597,000,000 |  | $ 597,000,000 |  |  |  |  |  | CAD 750 |
Debt instrument, stated interest rate percentage |  |  |  |  | 2.125% |  |  | 2.125% |  | 2.125% |  |  | 2.125% | 2.125% |  | 2.125% |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | $ 593,000,000 |  | $ 593,000,000 | $ 0 |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Dec. 31, 2024 |  |  |  |  |  |  |
Canadian Senior Notes | 2.125% canadian senior notes | Government of Canada Yield |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  |  |  |  | 0.215% |  |  |  |  |  |  |  |  |  |  |  |
Euro Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Euro Senior Notes | 0.375% Euro Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  | $ 815,000,000 |  |  |  |  | $ 839,000,000 |  | $ 839,000,000 |  |  |  |  | € 700,000,000 |  |
Debt instrument, stated interest rate percentage |  |  | 0.375% |  |  |  |  | 0.375% |  | 0.375% |  |  | 0.375% | 0.375% | 0.375% |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | $ 832,000,000 |  | $ 832,000,000 | 0 |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Dec. 31, 2023 |  |  |  |  |  |  |
Euro Senior Notes | 0.375% Euro Senior Notes | Euro Government Yield |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  |  | 0.01% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Euro Senior Notes | 1.500% euro senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  | $ 582,000,000 |  |  |  |  | $ 599,000,000 |  | $ 599,000,000 |  |  |  |  | € 500,000,000 |  |
Debt instrument, stated interest rate percentage |  |  | 1.50% |  |  |  |  | 1.50% |  | 1.50% |  |  | 1.50% | 1.50% | 1.50% |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | $ 594,000,000 |  | $ 594,000,000 | 0 |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Dec. 31, 2032 |  |  |  |  |  |  |
Euro Senior Notes | 1.500% euro senior notes | Euro Government Yield |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  |  | 0.02% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Euro Senior Notes | 1.000% euro senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | $ 599,000,000 |  | $ 599,000,000 |  |  |  | € 500,000,000 |  |  |
Debt instrument, stated interest rate percentage |  |  |  |  |  |  |  | 1.00% |  | 1.00% |  |  | 1.00% | 1.00% |  |  |
Debt Instrument, Redemption Price, Percentage |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | $ 595,000,000 |  | $ 595,000,000 | 523,000,000 |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Nov. 30, 2028 |  |  |  |  |  |  |
Euro Senior Notes | 1.000% euro senior notes | German Government |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  |  |  |  |  |  |  |  |  | 0.15% |  |  |  |  |  |  |
Commercial paper |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | 3,203,000,000 |  | $ 3,203,000,000 |  |  |  |  |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | 3,203,000,000 |  | $ 3,203,000,000 | $ 3,250,000,000 |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Dec. 31, 2018 |  |  |  |  |  |  |
Commercial paper | U.S. Commercial Paper Program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper program, authorized to borrow |  |  |  |  |  |  |  | 10,000,000,000.0 |  | $ 10,000,000,000.0 |  |  |  | € 5,000,000,000.0 |  |  |
Long-term Debt |  |  |  |  |  |  |  | $ 2,458,000,000 |  | $ 2,458,000,000 |  |  |  |  |  |  |
Debt, Weighted Average Interest Rate |  |  |  |  |  |  |  | 1.35% |  | 1.35% |  |  | 1.35% | 1.35% |  |  |
Commercial paper | Foreign Commercial Paper Program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt |  |  |  |  |  |  |  | $ 745,000,000 |  | $ 745,000,000 |  |  |  | € 622,000,000 |  |  |
Debt, Weighted Average Interest Rate |  |  |  |  |  |  |  | (0.41%) |  | (0.41%) |  |  | (0.41%) | (0.41%) |  |  |
Senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, Weighted Average Interest Rate |  |  |  |  |  |  |  | 0.50% |  | 0.50% | 0.00% |  | 0.50% | 0.50% |  |  |
Senior notes | Maximum | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  |  |  |  |  |  |  |  |  | 0.45% |  |  |  |  |  |  |
Senior notes | Minimum | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  |  |  |  |  |  |  |  |  | 0.15% |  |  |  |  |  |  |
Senior notes | 3.750% senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 1,150,000,000.00 |  |  |  |  |  | $ 1,150,000,000 |  | $ 1,150,000,000 |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  | 3.75% |  |  |  |  |  | 3.75% |  | 3.75% |  |  | 3.75% | 3.75% |  |  |
Debt Instrument, Redemption Price, Percentage |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | $ 1,135,000,000 |  | $ 1,135,000,000 | $ 0 |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Nov. 30, 2047 |  |  |  |  |  |  |
Applicable margin rates |  | 0.15% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior notes | 2.800% senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 500,000,000 |  |  |  |  |  | $ 500,000,000 |  | $ 500,000,000 |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  | 2.80% |  |  |  |  |  | 2.80% |  | 2.80% |  |  | 2.80% | 2.80% |  |  |
Debt Instrument, Redemption Price, Percentage |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | $ 495,000,000 |  | $ 495,000,000 | 0 |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Nov. 30, 2024 |  |  |  |  |  |  |
Senior notes | 2.800% senior notes | US Treasury Yield |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  | 0.10% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior notes | 3.050% senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 1,000,000,000 |  |  |  |  |  | $ 1,000,000,000 |  | $ 1,000,000,000 |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  | 3.05% |  |  |  |  |  | 3.05% |  | 3.05% |  |  | 3.05% | 3.05% |  |  |
Debt Instrument, Redemption Price, Percentage |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | $ 990,000,000 |  | $ 990,000,000 | 0 |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Nov. 30, 2027 |  |  |  |  |  |  |
Senior notes | 3.050% senior notes | US Treasury Yield |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  | 0.15% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior notes | 3.40% senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | $ 500,000,000 |  | $ 500,000,000 |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  |  |  |  |  |  |  | 3.40% |  | 3.40% |  |  | 3.40% | 3.40% |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | $ 491,000,000 |  | $ 491,000,000 | 491,000,000 |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Dec. 31, 2046 |  |  |  |  |  |  |
Senior notes | 2.350% senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  | $ 600,000,000 |  | $ 600,000,000 |  | $ 600,000,000 |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  |  |  |  |  | 2.35% |  | 2.35% |  | 2.35% |  |  | 2.35% | 2.35% |  |  |
Debt Instrument, Redemption Price, Percentage |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | $ 597,000,000 |  | $ 597,000,000 | 0 |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | May 31, 2022 |  |  |  |  |  |  |
Senior notes | 2.350% senior notes | US Treasury Yield |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  |  |  |  |  | 0.10% |  |  |  |  |  |  |  |  |  |  |
Senior notes | 5.50% senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | $ 750,000,000 |  | $ 750,000,000 |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  |  |  |  |  |  |  | 5.50% |  | 5.50% |  |  | 5.50% | 5.50% |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | $ 751,000,000 |  | $ 751,000,000 | $ 769,000,000 |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Dec. 31, 2018 |  |  |  |  |  |  |
Maturity - Maximum Date |  |  |  |  |  |  |  |  |  | Jan. 01, 2018 |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  |  |  |  | 3.45% |  | 3.45% | 2.94% |  | 3.45% | 3.45% |  |  |
Senior notes | 1.125% senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | $ 375,000,000 |  | $ 375,000,000 |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  |  |  | 1.125% |  |  |  | 1.125% |  | 1.125% |  |  | 1.125% | 1.125% |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | $ 0 |  | $ 0 | $ 374,000,000 |  |  |  |  |  |
Repayments of long-term borrowings |  |  |  | $ 375,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Dec. 31, 2017 |  |  |  |  |  |  |
Maturity - Maximum Date |  |  |  |  |  |  |  |  |  | Jan. 01, 2017 |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  |  |  |  | 1.51% |  | 1.51% | 1.04% |  | 1.51% | 1.51% |  |  |
Senior notes | 5.125% senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | $ 1,000,000,000 |  | $ 1,000,000,000 |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  |  |  |  |  |  |  | 5.125% |  | 5.125% |  |  | 5.125% | 5.125% |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | $ 1,019,000,000 |  | $ 1,019,000,000 | $ 1,043,000,000 |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Dec. 31, 2019 |  |  |  |  |  |  |
Maturity - Maximum Date |  |  |  |  |  |  |  |  |  | Jan. 01, 2019 |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  |  |  |  | 2.98% |  | 2.98% | 2.49% |  | 2.98% | 2.98% |  |  |
Senior notes | 3.125% senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | $ 1,500,000,000 |  | $ 1,500,000,000 |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  |  |  |  |  |  |  | 3.125% |  | 3.125% |  |  | 3.125% | 3.125% |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | $ 1,549,000,000 |  | $ 1,549,000,000 | $ 1,584,000,000 |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Dec. 31, 2021 |  |  |  |  |  |  |
Maturity - Maximum Date |  |  |  |  |  |  |  |  |  | Jan. 01, 2021 |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  |  |  |  | 1.34% |  | 1.34% | 1.40% |  | 1.34% | 1.34% |  |  |
Senior notes | 8.375% debentures Due 2030 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | $ 276,000,000 |  | $ 276,000,000 |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  |  |  |  |  |  |  | 8.375% |  | 8.375% |  |  | 8.375% | 8.375% |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | $ 282,000,000 |  | $ 282,000,000 | $ 282,000,000 |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Dec. 31, 2030 |  |  |  |  |  |  |
Senior notes | 8.375% debentures Due 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | $ 424,000,000 |  | $ 424,000,000 |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  |  |  |  |  |  |  | 8.375% |  | 8.375% |  |  | 8.375% | 8.375% |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | $ 447,000,000 |  | $ 447,000,000 | 461,000,000 |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Dec. 31, 2020 |  |  |  |  |  |  |
Senior notes | Floating rate senior notes maturing 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  | $ 400,000,000 |  | 400,000,000 |  | $ 400,000,000 |  |  |  |  |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | 398,000,000 |  | $ 398,000,000 | $ 0 |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | May 31, 2022 |  |  |  |  |  |  |
Senior notes | Floating rate senior notes maturing 2022 | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  |  |  |  |  | 0.38% |  |  |  |  |  |  |  |  |  |  |
Senior notes | Euro Senior Notes Due July 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | 500,000,000 |  | $ 500,000,000 |  |  |  |  |  |  |
Average interest rate |  |  |  |  |  |  |  |  |  | 0.10% | 0.19% |  |  |  |  |  |
Senior notes | Euro Senior Notes Due July 2020 | EURIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  |  |  |  |  |  | 43000000.00% |  |  |  |  |  |  |  |  |  |
Senior notes | Euro Senior Notes Due November 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | $ 700,000,000 |  | $ 700,000,000 |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  |  |  |  |  |  |  | 1.625% |  | 1.625% |  |  | 1.625% | 1.625% |  |  |
Debt Instrument, Redemption Price, Percentage |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |
Applicable margin rates |  |  |  |  |  |  |  |  |  | 0.20% |  |  |  |  |  |  |
Senior notes | 2.40% senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | $ 500,000,000 |  | $ 500,000,000 |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  |  |  |  |  |  |  | 2.40% |  | 2.40% |  |  | 2.40% | 2.40% |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | $ 497,000,000 |  | $ 497,000,000 | $ 497,000,000 |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Dec. 31, 2026 |  |  |  |  |  |  |
Senior notes | Floating rate senior notes maturing 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 350,000,000 |  |  |  |  |  | 350,000,000 |  | $ 350,000,000 |  |  |  |  |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | 348,000,000 |  | $ 348,000,000 | 0 |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Apr. 30, 2021 |  |  |  |  |  |  |
Senior notes | Floating rate senior notes maturing 2021 | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  | 0.15% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior notes | Floating rate senior notes maturing 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 500,000,000 |  |  |  |  |  | 500,000,000 |  | $ 500,000,000 |  |  |  |  |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | 496,000,000 |  | $ 496,000,000 | 0 |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Apr. 30, 2023 |  |  |  |  |  |  |
Senior notes | Floating rate senior notes maturing 2023 | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  | 0.45% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior notes | 2.050% senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 700,000,000 |  |  |  |  |  | $ 700,000,000 |  | $ 700,000,000 |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  | 2.05% |  |  |  |  |  | 2.05% |  | 2.05% |  |  | 2.05% | 2.05% |  |  |
Debt Instrument, Redemption Price, Percentage |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | $ 696,000,000 |  | $ 696,000,000 | 0 |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Apr. 30, 2021 |  |  |  |  |  |  |
Senior notes | 2.050% senior notes | US Treasury Yield |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  | 0.10% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior notes | 2.500% senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 1,000,000,000 |  |  |  |  |  | $ 1,000,000,000 |  | $ 1,000,000,000 |  |  |  |  |  |  |
Debt instrument, stated interest rate percentage |  | 2.50% |  |  |  |  |  | 2.50% |  | 2.50% |  |  | 2.50% | 2.50% |  |  |
Debt Instrument, Redemption Price, Percentage |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | $ 992,000,000 |  | $ 992,000,000 | 0 |  |  |  |  |  |
Maturity |  |  |  |  |  |  |  |  |  | Apr. 30, 2023 |  |  |  |  |  |  |
Senior notes | 2.500% senior notes | US Treasury Yield |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  | 0.10% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior notes | Floating rate senior notes maturing 2049-2067 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | $ 64 |  |  |  |  |  |  | 1,043,000,000 | $ 147 | $ 1,043,000,000 |  |  |  |  |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  |  |  | $ 1,032,000,000 |  | $ 1,032,000,000 | $ 824,000,000 |  |  |  |  |  |
Average interest rate |  |  |  |  |  |  |  |  |  | 0.74% | 0.21% |  |  |  |  |  |
Senior notes earliest callable period |  |  |  |  |  |  |  |  |  | 30 years |  |  |  |  |  |  |
Senior notes earliest putable period |  |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |  |
Maturity - Minimum Date |  |  |  |  |  |  |  |  |  | Dec. 31, 2049 |  |  |  |  |  |  |
Maturity - Maximum Date |  |  |  |  |  |  |  |  |  | Dec. 31, 2067 |  |  |  |  |  |  |
Senior notes | Floating rate senior notes maturing 2049-2067 | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates | 0.35% |  |  |  |  |  |  |  | 0.30% |  |  |  |  |  |  |  |
Senior notes | Floating rate senior notes maturing 2049-2067 | Maximum | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  |  |  |  |  |  |  |  |  | 0.45% |  |  |  |  |  |  |
Senior notes | Floating rate senior notes maturing 2049-2067 | Minimum | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable margin rates |  |  |  |  |  |  |  |  |  | 0.30% |  |  |  |  |  |  |

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