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v3.19.3.a.u2

Borrowings and Credit Arrangements - Short-term Borrowings (Details) - USD ($) |  |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Nov. 28, 2018 | Oct. 26, 2018 | Dec. 31, 2019 | Dec. 31, 2017 | Dec. 31, 2018 | Mar. 09, 2018 | Dec. 15, 2017 | Dec. 03, 2017
Short-term Debt [Line Items] |  |  |  |  |  |  |  |
Short-term debt |  |  | $ 0 |  | $ 720,000,000 |  |  |
Federal home loan bank advances maximum amount available |  |  | 850,000,000 |  |  |  |  |
2018 Senior Notes |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |
Debt face amount |  |  |  |  |  | $ 40,000,000,000 |  |
Notes Payable | 3-Year and 5-Year Term Loan |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | $ 5,000,000,000.0 |
Debt face amount | $ 5,000,000,000.0 |  |  |  |  |  |  |
Senior Notes | 2018 Senior Notes |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |
Debt face amount |  |  |  |  |  | 40,000,000,000.0 |  |
Commercial Paper |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |
Short-term debt |  |  | 0 |  | $ 720,000,000 |  |  |
Short-term debt, weighted average interest rate |  |  |  |  | 2.80% |  |  |
Line of Credit | Back-Up Credit Facilities |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |
Short-term debt |  |  | $ 0 |  | $ 0 |  |  |
Commitment fee percentage |  |  | 0.03% |  |  |  |  |
Line of Credit | Revolving Credit Facility, Expiring May 14, 2020 |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  | $ 1,000,000,000.0 |  |  |  |  |
Debt instrument term |  |  | 364 days |  |  |  |  |
Line of Credit | Revolving Credit Facility, Expiring May 18, 2022 |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  | $ 1,000,000,000.0 |  |  |  |  |
Debt instrument term |  |  | 5 years |  |  |  |  |
Line of Credit | Revolving Credit Facility, Expiring May 17, 2023 |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  | $ 2,000,000,000.0 |  |  |  |  |
Debt instrument term |  |  | 5 years |  |  |  |  |
Line of Credit | Revolving Credit Facility, Expiring May 16, 2024 |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  | $ 2,000,000,000.0 |  |  |  |  |
Debt instrument term |  |  | 5 years |  |  |  |  |
Bridge Loan |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |
Debt instrument term |  | 364 days |  |  |  |  |  |
Debt face amount |  | $ 4,000,000,000.0 |  |  |  | 4,000,000,000.0 | $ 44,000,000,000.0 | $ 49,000,000,000.0
Debt issuance cost capitalized |  |  |  |  |  | $ 8,000,000 |  | $ 221,000,000
Amortization of debt issuance costs |  |  | $ 173,000,000 | $ 56,000,000 |  |  |  |
Extinguishment of debt | $ 4,000,000,000.0 |  |  |  |  |  |  |
Federal Home Loan Bank Advances |  |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |  |
Short-term debt |  |  | $ 0 |  | $ 0 |  |  |

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