v3.3.1.900

Debt Summary of Long-term Debt (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Long-term Debt and Capital Lease Obligations, Including Current Maturities	$ 8,023	$ 9,032
Current portion of long-term debt	(242)	(1,008)
Long-term Debt and Capital Lease Obligations	7,781	8,024
Notes [Member] | Notes due 2015 [Member]
Debt Instrument [Line Items]
Notes	$ 0
Long term debt debentures		$ 100
Debt Instrument, Interest Rate, Stated Percentage	4.65%	4.65%
Debt Instrument, Maturity Date	Jun. 15, 2015	Jun. 15, 2015
Notes [Member] | Notes due 2017 [Member]
Debt Instrument [Line Items]
Notes	$ 250	$ 250
Debt Instrument, Interest Rate, Stated Percentage	5.30%	5.30%
Debt Instrument, Maturity Date	Mar. 15, 2017	Mar. 15, 2017
Related long term debt converted to floating interest rates by interest rate swaps	$ 150
Notes [Member] | Notes due 2018 [Member]
Debt Instrument [Line Items]
Notes	$ 450	$ 450
Debt Instrument, Interest Rate, Stated Percentage	5.60%	5.60%
Debt Instrument, Maturity Date	May 15, 2018	May 15, 2018
Related long term debt converted to floating interest rates by interest rate swaps	$ 415
Notes [Member] | Notes due 2019 [Member]
Debt Instrument [Line Items]
Notes	$ 300	$ 300
Debt Instrument, Interest Rate, Stated Percentage	6.95%	6.95%
Debt Instrument, Maturity Date	Mar. 20, 2019	Mar. 20, 2019
Related long term debt converted to floating interest rates by interest rate swaps	$ 300
Notes [Member] | Notes due 2021 [Member]
Debt Instrument [Line Items]
Notes	$ 300	$ 300
Debt Instrument, Interest Rate, Stated Percentage	3.47%	3.47%
Debt Instrument, Maturity Date	Jun. 28, 2021	Jun. 28, 2021
Related long term debt converted to floating interest rates by interest rate swaps	$ 275
Notes [Member] | Notes due 2023 [Member]
Debt Instrument [Line Items]
Notes	$ 300	$ 300
Debt Instrument, Interest Rate, Stated Percentage	3.68%	3.68%
Debt Instrument, Maturity Date	Jun. 28, 2023	Jun. 28, 2023
Related long term debt converted to floating interest rates by interest rate swaps	$ 200
Notes [Member] | Notes due 2037 [Member]
Debt Instrument [Line Items]
Notes	$ 240	$ 240
Debt Instrument, Interest Rate, Stated Percentage	5.80%	5.80%
Debt Instrument, Maturity Date	Mar. 15, 2037	Mar. 15, 2037
Notes [Member] | Notes due from 2018 to 2035 [Member]
Debt Instrument [Line Items]
Notes	$ 239
Related long term debt converted to floating interest rates by interest rate swaps	$ 50
Notes ranging from 5.25% to 8.875%, Interest Rate, Stated Percentage Rate Range, Minimum	5.25%
Notes ranging from 5.25% to 8.875%, Interest Rate, Stated Percentage Rate Range, Maximum	8.875%
Notes maturing from 2014 to 2035, Maturity Date Range, Start	Mar. 20, 2014
Notes maturing from 2014 to 2035, Maturity Date Range, End	Jun. 15, 2035
Notes [Member] | Notes due from 2012 to 2035 [Member]
Debt Instrument [Line Items]
Notes		$ 239
Related long term debt converted to floating interest rates by interest rate swaps		$ 50
Notes ranging from 5.25% to 8.875%, Interest Rate, Stated Percentage Rate Range, Minimum		5.25%
Notes ranging from 5.25% to 8.875%, Interest Rate, Stated Percentage Rate Range, Maximum		12.50%
Notes maturing from 2014 to 2035, Maturity Date Range, Start		Mar. 20, 2014
Notes maturing from 2014 to 2035, Maturity Date Range, End		Jun. 15, 2035
Japanese Yen notes payable [Member] | Japanese Yen notes due 2018 [Member]
Debt Instrument [Line Items]
Notes	$ 83	$ 84
Debt Instrument, Interest Rate, Stated Percentage	4.215%	4.215%
Debt Instrument, Maturity Date	Dec. 17, 2018	Dec. 17, 2018
Senior Notes [Member] | Senior notes due 2015 [Member]
Debt Instrument [Line Items]
Long term debt debentures		$ 600
Senior Notes	$ 0
Debt Instrument, Interest Rate, Stated Percentage	0.95%	0.95%
Debt Instrument, Maturity Date	Nov. 02, 2015	Nov. 02, 2015
Senior Notes [Member] | Senior notes due 2017 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 1,000	$ 1,000
Debt Instrument, Interest Rate, Stated Percentage	1.50%	1.50%
Debt Instrument, Maturity Date	Nov. 02, 2017	Nov. 02, 2017
Related long term debt converted to floating interest rates by interest rate swaps	$ 750
Senior Notes [Member] | Senior notes due 2022 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 1,600	$ 1,600
Debt Instrument, Interest Rate, Stated Percentage	2.75%	2.75%
Debt Instrument, Maturity Date	Nov. 02, 2022	Nov. 02, 2022
Related long term debt converted to floating interest rates by interest rate swaps	$ 1,350
Senior Notes [Member] | Senior notes due 2032 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 700	$ 700
Debt Instrument, Interest Rate, Stated Percentage	4.00%	4.00%
Debt Instrument, Maturity Date	Nov. 02, 2032	Nov. 02, 2032
Senior Notes [Member] | Senior notes due 2042 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 1,000	$ 1,000
Debt Instrument, Interest Rate, Stated Percentage	4.15%	4.15%
Debt Instrument, Maturity Date	Nov. 02, 2042	Nov. 02, 2042
Debenture [Member] | Debenture due 2015 [Member]
Debt Instrument [Line Items]
Long term debt debentures	$ 0	$ 300
Debt Instrument, Interest Rate, Stated Percentage	5.45%	5.45%
Debt Instrument, Maturity Date	Apr. 01, 2015	Apr. 01, 2015
Debenture [Member] | Debentures due 2016 [Member]
Debt Instrument [Line Items]
Long term debt debentures	$ 240	$ 240
Debt Instrument, Interest Rate, Stated Percentage	2.375%	2.375%
Debt Instrument, Maturity Date	Jan. 15, 2016	Jan. 15, 2016
Debenture [Member] | Debentures due 2017 [Member]
Debt Instrument [Line Items]
Long term debt debentures	$ 289	$ 289
Debt Instrument, Interest Rate, Stated Percentage	6.10%	6.10%
Debt Instrument, Maturity Date	Jul. 01, 2017	Jul. 01, 2017
Debenture [Member] | Debentures due 2020 [Member]
Debt Instrument [Line Items]
Long term debt debentures	$ 239	$ 239
Debt Instrument, Interest Rate, Stated Percentage	3.875%	3.875%
Debt Instrument, Maturity Date	Dec. 15, 2020	Dec. 15, 2020
Related long term debt converted to floating interest rates by interest rate swaps	$ 150
Debenture [Member] | Debentures due 2022 [Member]
Debt Instrument [Line Items]
Long term debt debentures	$ 100	$ 100
Debt Instrument, Interest Rate, Stated Percentage	8.10%	8.10%
Debt Instrument, Maturity Date	Aug. 15, 2022	Aug. 15, 2022
Debenture [Member] | Debentures due 2025 [Member]
Debt Instrument [Line Items]
Long term debt debentures	$ 145	$ 145
Debt Instrument, Interest Rate, Stated Percentage	6.50%	6.50%
Debt Instrument, Maturity Date	Jun. 01, 2025	Jun. 01, 2025
Debenture [Member] | Debentures due 2029 [Member]
Debt Instrument [Line Items]
Long term debt debentures	$ 200	$ 200
Debt Instrument, Interest Rate, Stated Percentage	7.65%	7.65%
Debt Instrument, Maturity Date	Nov. 15, 2029	Nov. 15, 2029
Related long term debt converted to floating interest rates by interest rate swaps	$ 50
Debenture [Member] | Debentures due 2034 [Member]
Debt Instrument [Line Items]
Long term debt debentures	$ 136	$ 136
Debt Instrument, Interest Rate, Stated Percentage	5.45%	5.45%
Debt Instrument, Maturity Date	Oct. 15, 2034	Oct. 15, 2034
Related long term debt converted to floating interest rates by interest rate swaps	$ 25
Other long-term debt [Member]
Debt Instrument [Line Items]
Other	$ 212	$ 220

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