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Financing Arrangements and Derivative Financial Instruments - Notes Narrative (Details) - USD ($) |  |  |  | 6 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
May 18, 2021 | May 06, 2021 | Apr. 06, 2021 | Jun. 30, 2021 | Jun. 30, 2020 | May 31, 2021 | Dec. 31, 2020
Debt Instrument [Line Items] |  |  |  |  |  |  |
Notes payable |  |  |  | $ 5,436,000,000 |  |  | $ 3,860,000,000
Senior notes |  |  |  |  |  |  | $ 1,450,000,000
Repayments of long-term debt |  |  |  | $ 3,042,000,000 | $ 3,879,000,000 |  |
5.125% due 2023 | Senior Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, principal amount |  |  |  |  |  | $ 1,000,000,000.0 |
Interest rate, stated percentage |  | 5.125% |  | 5.125% |  | 5.125% | 5.125%
Debt instrument, redemption price percentage |  | 100.00% |  |  |  |  |
Repayments of long-term debt |  | $ 1,000,000,000.0 |  |  |  |  |
5.25% due April 2031 | Senior Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, principal amount |  |  | $ 550,000,000 |  |  |  |
Interest rate, stated percentage |  |  | 5.25% | 5.25% |  |  | 5.25%
Debt instrument, maturity date |  |  | Apr. 30, 2031 |  |  |  |
Notes sold, percentage of principle amount |  |  | 100.00% |  |  |  |
Basis spread |  |  | 0.50% |  |  |  |
5.25% due April 2031 | Senior Notes | Debt Instrument, Redemption, Prior to January 2031 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, redemption price percentage |  |  | 100.00% |  |  |  |
5.25% due April 2031 | Senior Notes | Debt Instrument, Redemption, After to January 2031 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, redemption price percentage |  |  | 100.00% |  |  |  |
5.25% due July 2031 | Senior Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, principal amount | $ 600,000,000 |  |  |  |  |  |
Interest rate, stated percentage | 5.25% |  |  | 5.25% |  |  | 5.25%
Debt instrument, maturity date | Jul. 15, 2031 |  |  |  |  |  |
Notes sold, percentage of principle amount | 100.00% |  |  |  |  |  |
Basis spread | 0.50% |  |  |  |  |  |
5.25% due July 2031 | Senior Notes | Debt Instrument, Redemption, Prior to April 2031 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, redemption price percentage | 100.00% |  |  |  |  |  |
5.25% due July 2031 | Senior Notes | Debt Instrument, Redemption, After to April 2031 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, redemption price percentage | 100.00% |  |  |  |  |  |
5.625% due 2033 | Senior Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, principal amount |  |  | $ 450,000,000 |  |  |  |
Interest rate, stated percentage |  |  | 5.625% | 5.625% |  |  | 5.625%
Debt instrument, maturity date |  |  | Apr. 30, 2033 |  |  |  |
Notes sold, percentage of principle amount |  |  | 100.00% |  |  |  |
Basis spread |  |  | 0.50% |  |  |  |
5.625% due 2033 | Senior Notes | Debt Instrument, Redemption, Prior to January 2033 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, redemption price percentage |  |  | 100.00% |  |  |  |
5.625% due 2033 | Senior Notes | Debt Instrument, Redemption, After to January 2033 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, redemption price percentage |  |  | 100.00% |  |  |  |
5% due 2029 | Senior Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, principal amount | $ 850,000,000 |  |  |  |  |  |
Interest rate, stated percentage | 5.00% |  |  | 5.00% |  |  | 5.00%
Debt instrument, maturity date | Jul. 15, 2029 |  |  |  |  |  |
Notes sold, percentage of principle amount | 100.00% |  |  |  |  |  |
Basis spread | 0.50% |  |  |  |  |  |
5% due 2029 | Senior Notes | Debt Instrument, Redemption, Prior to April 2029 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, redemption price percentage | 100.00% |  |  |  |  |  |
5% due 2029 | Senior Notes | Debt Instrument, Redemption, After to April 2029 |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, redemption price percentage | 100.00% |  |  |  |  |  |
7.625% due 2027 | Senior Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, principal amount |  |  |  | $ 117,000,000 |  |  |
Interest rate, stated percentage |  |  |  | 7.625% |  |  |
Debt instrument, maturity date |  |  |  | Mar. 15, 2027 |  |  |
Debt extinguishment costs related to remaining unamortized debt issuance costs |  |  |  | $ 19,000,000 |  |  |

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- Definition Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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