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Debt - Narrative (Details) | 1 Months Ended | 12 Months Ended |  |  |
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Nov. 30, 2020 USD ($) tranche offering $ / shares shares | Aug. 31, 2020 USD ($) $ / shares shares | Jun. 30, 2020 USD ($) tranche | Apr. 30, 2020 USD ($) shares $ / shares | Nov. 30, 2020 USD ($) day shares offering tranche $ / shares | Nov. 30, 2019 USD ($) | Nov. 30, 2018 USD ($) | Nov. 30, 2020 EUR (€) tranche offering | Jul. 31, 2020 USD ($) tranche | Jul. 31, 2020 EUR (€) tranche | Jun. 30, 2020 EUR (€) tranche
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from short term debt |  |  |  |  | $ 525,000,000 | $ 0 | $ 2,000,000 |  |  |  |
Repayments of short term debt |  |  |  |  | $ 526,000,000 | 0 | 2,000,000 |  |  |  |
Debt instrument, convertible, conversion ratio |  |  |  |  | 3.0 |  |  |  |  |  |
Debt instrument, convertible, equity component minimum threshold |  |  |  |  | $ 5,000,000,000.0 |  |  |  |  |  |
Debt instrument, convertible, debt to capital ratio maximum threshold |  |  |  |  | 65.00% |  |  |  |  |  |
Line of credit, maturity period |  |  |  |  | 12 years |  |  |  |  |  |
Loss on extinguishment of debt |  |  |  |  | $ (464,000,000) | $ 0 | $ 0 |  |  |  |
November Registered Direct Offering |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of registered direct offerings | offering | 2 |  |  |  | 2 |  |  | 2 |  |  |
Common stock | August Registered Direct Offering |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares issued (in shares) | shares |  | 99,200,000 |  |  |  |  |  |  |  |  |
Price per share (in dollars per share) | $ / shares |  | $ 14.02 |  |  |  |  |  |  |  |  |
Common stock | November Registered Direct Offering, Sale One |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares issued (in shares) | shares | 57,400,000 |  |  |  |  |  |  |  |  |  |
Price per share (in dollars per share) | $ / shares | $ 18.05 |  |  |  | $ 18.05 |  |  |  |  |  |
Common stock | November Registered Direct Offering, Sale Two |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares issued (in shares) | shares | 10,400,000 |  |  |  |  |  |  |  |  |  |
Price per share (in dollars per share) | $ / shares | $ 17.59 |  |  |  | $ 17.59 |  |  |  |  |  |
Senior Notes 3.95% due in 2020 and Senior Notes 1.625% due in 2021 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Loss on extinguishment of debt |  |  |  |  | $ 5,000,000 |  |  |  |  |  |
Export credit facilities with financial covenant waivers |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-term debt | $ 7,300,000,000 |  |  |  | 7,300,000,000 |  |  |  |  |  |
Bank loans with financial covenant waivers |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-term debt | 2,100,000,000 |  |  |  | 2,100,000,000 |  |  |  |  |  |
Bank loans remaining with financial covenant waivers |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-term debt | 479,000,000 |  |  |  | 479,000,000 |  |  |  |  |  |
Secured Debt | Senior Secured Notes due 2023 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  | $ 4,000,000,000.0 |  |  |  |  |  |  |
Debt instrument, interest rate (percent) |  |  |  | 11.50% |  |  |  |  |  |  |
Debt Instrument, collateral | 27,800,000,000 |  |  |  | $ 27,800,000,000 |  |  |  |  |  |
Secured Debt | Senior Secured Notes due 2023 | Maximum | On or After January 1, 2023 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, redemption price, percentage (less than 98%) |  |  |  |  | 101.00% |  |  |  |  |  |
Secured Debt | Senior Secured Term Loan Facility due 2025 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  | $ 2,800,000,000 |  |  |  |  |  |  |  |
Number of tranches | tranche |  |  | 2 |  |  |  |  |  |  |  | 2
Secured Debt | Senior Secured Term Loan Facility due 2025, Tranche One |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  | $ 1,900,000,000 |  |  |  |  |  |  |  |
Secured Debt | Senior Secured Term Loan Facility due 2025, Tranche One | LIBOR |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, floor rate on variable rate (percentage) |  |  | 1.00% |  |  |  |  |  |  |  |
Debt instrument, variable rate (percent) |  |  | 7.50% |  |  |  |  |  |  |  |
Secured Debt | Senior Secured Term Loan Facility due 2025, Tranche Two |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | € |  |  |  |  |  |  |  |  |  |  | € 800,000,000
Secured Debt | Senior Secured Term Loan Facility due 2025, Tranche Two | Eurodollar |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, floor rate on variable rate (percentage) |  |  | 0.00% |  |  |  |  |  |  |  |
Debt instrument, variable rate (percent) |  |  | 7.50% |  |  |  |  |  |  |  |
Secured Debt | Senior Secured Term Loan Facility due 2026 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  | $ 1,300,000,000 |  |
Number of tranches | tranche |  |  |  |  |  |  |  |  | 2 | 2 |
Secured Debt | Senior Secured Term Loan Facility due 2026, Tranche One |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  | $ 775,000,000 |  |
Debt instrument, interest rate (percent) |  |  |  |  |  |  |  |  | 10.50% | 10.50% |
Secured Debt | Senior Secured Term Loan Facility due 2026, Tranche Two |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | € |  |  |  |  |  |  |  |  |  | € 425,000,000 |
Debt instrument, interest rate (percent) |  |  |  |  |  |  |  |  | 10.10% | 10.10% |
Secured Debt | Senior Secured Term Loan Facility due 2027 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 900,000,000 |  |  |  |  |  |  |  |  |
Debt instrument, interest rate (percent) |  | 9.90% |  |  |  |  |  |  |  |  |
Unsecured Debt | Senior Unsecured Term Loan Facility due 2026 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | $ 2,000,000,000.0 |  |  |  | $ 2,000,000,000.0 |  |  |  |  |  |
Number of tranches | tranche | 2 |  |  |  | 2 |  |  | 2 |  |  |
Unsecured Debt | Senior Unsecured Term Loan Facility due 2026, Tranche One |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | $ 1,500,000,000 |  |  |  | $ 1,500,000,000 |  |  |  |  |  |
Debt instrument, interest rate (percent) | 7.60% |  |  |  | 7.60% |  |  | 7.60% |  |  |
Unsecured Debt | Senior Unsecured Term Loan Facility due 2026, Tranche Two |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount | € |  |  |  |  |  |  |  | € 500,000,000 |  |  |
Debt instrument, interest rate (percent) | 7.60% |  |  |  | 7.60% |  |  | 7.60% |  |  |
Convertible | Senior Convertible Notes due 2023 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-term debt | $ 461,000,000 |  |  |  | $ 461,000,000 |  |  |  |  |  |
Debt instrument, face amount |  |  |  | $ 2,000,000,000.0 |  |  |  |  |  |  |
Debt instrument, interest rate (percent) |  |  |  | 5.75% |  |  |  |  |  |  |
Debt instrument, convertible, number of shares | shares |  |  |  | 100 |  |  |  |  |  |  |
Conversion rate, amount |  |  |  | $ 1,000 |  |  |  |  |  |  |
Debt instrument, conversion price (in dollars per share) | $ / shares |  |  |  | $ 10 |  |  |  |  |  |  |
Repurchase amount | 590,000,000 | $ 886,000,000 |  |  | 590,000,000 |  |  |  |  |  |
Loss on extinguishment of debt |  |  |  |  | 464,000,000 |  |  |  |  |  |
Debt instrument, convertible, carrying amount | $ 286,000,000 |  |  |  | $ 286,000,000 |  |  |  |  |  |
Debt instrument, effective interest rate (percentage) | 12.90% |  |  |  | 12.90% |  |  | 12.90% |  |  |
Debt instrument, convertible, carrying amount, after partial repurchase | $ 0 |  |  |  | $ 0 |  |  |  |  |  |
Convertible | Senior Convertible Notes due 2023 | Measurement Period |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Conversion rate, amount |  |  |  |  | $ 1,000 |  |  |  |  |  |
Convertible threshold trading days | day |  |  |  |  | 5 |  |  |  |  |  |
Convertible threshold consecutive trading days | day |  |  |  |  | 5 |  |  |  |  |  |
Convertible | Senior Convertible Notes due 2023 | On or After January 1, 2023 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, redemption price, percentage (less than 98%) |  |  |  |  | 100.00% |  |  |  |  |  |
Debt instrument, convertible, number of shares | shares |  |  |  |  | 100 |  |  |  |  |  |
Conversion rate, amount |  |  |  |  | $ 1,000 |  |  |  |  |  |
Convertible | Senior Convertible Notes due 2023 | Minimum | Before January 1, 2023 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, redemption price, percentage (less than 98%) |  |  |  |  | 130.00% |  |  |  |  |  |
Convertible threshold trading days | day |  |  |  |  | 20 |  |  |  |  |  |
Convertible threshold consecutive trading days | day |  |  |  |  | 30 |  |  |  |  |  |
Convertible | Senior Convertible Notes due 2023 | Minimum | Measurement Period |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt instrument, redemption price, percentage (less than 98%) |  |  |  |  | 98.00% |  |  |  |  |  |

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