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Fair Value of Financial Instruments - Carrying Values and Fair Values of Non-Current Financial Assets and Liabilities (Detail) - USD ($) $ in Millions | Mar. 31, 2021 | Dec. 31, 2020
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Senior, mezzanine, and other loans | $ 162 | $ 159
Other noncurrent liabilities | (2,344) | (2,366)
Carrying Amount |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Senior, mezzanine, and other loans | 162 | 159
Total noncurrent financial assets | 162 | 159
Senior Notes | (8,716) | (8,031)
Commercial paper / Credit Facility | (400) | (900)
Other long-term debt | (126) | (126)
Other noncurrent liabilities | (426) | (426)
Total noncurrent financial liabilities | (9,668) | (9,483)
Fair Value |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Senior, mezzanine, and other loans | 146 | 142
Total noncurrent financial assets | 146 | 142
Senior Notes | (9,404) | (8,941)
Commercial paper / Credit Facility | (400) | (900)
Other long-term debt | (128) | (128)
Other noncurrent liabilities | (426) | (426)
Total noncurrent financial liabilities | $ (10,358) | $ (10,395)

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- Definition Amount, after allowance for credit loss, of financing receivable, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders. + References Reference 1: 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 + Details
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