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Shareholders' Equity - Changes in AOCI Attributable to Stockholders (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
OCI before reclassifications | $ 245 | $ (133) | $ (196) |
Amounts reclassified from AOCI | 14 | 93 | 10 |
OCI Balance | 259 | (40) | (186) |
Cumulative tax impact | (11) | 6 | 7 |
OCI Balance, net of tax | 248 | (34) | (179) |
Balance | 680 | 421 | 461 | $ 647
Cumulative tax impact | 43 | 54 | 48 | 41
Balance, net of tax | 723 | 475 | 509 | 688
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] |  |  |  |
OCI before reclassifications | 64 | (43) | (83) |
Amounts reclassified from AOCI |  | 79 | (1) |
OCI Balance | 64 | 36 | (84) |
Cumulative tax impact | (8) | (4) | 4 |
OCI Balance, net of tax | 56 | 32 | (80) |
Balance | 61 | (3) | (39) | 45
Cumulative tax impact | (8) |  | 4 |
Balance, net of tax | 53 | (3) | (35) | 45
Accumulated Net Gains (Losses) on Available-for-Sale Securities [Member] |  |  |  |
OCI before reclassifications |  | 3 | (2) |
OCI Balance |  | 3 | (2) |
OCI Balance, net of tax |  | 3 | (2) |
Balance | 1 | 1 | (2) |
Balance, net of tax | 1 | 1 | (2) |
Accumulated Defined Benefit Plan Items [Member] |  |  |  |
OCI before reclassifications | (22) | (58) | (24) |
Amounts reclassified from AOCI | 14 | 14 | 11 |
OCI Balance | (8) | (44) | (13) |
Cumulative tax impact | (3) | 10 | 3 |
OCI Balance, net of tax | (11) | (34) | (10) |
Balance | (231) | (223) | (179) | (166)
Cumulative tax impact | 51 | 54 | 44 | 41
Balance, net of tax | (180) | (169) | (135) | (125)
Foreign Currency Translation Adjustments ("CTA") [Member] |  |  |  |
OCI before reclassifications | 203 | (35) | (87) |
OCI Balance | 203 | (35) | (87) |
OCI Balance, net of tax | 203 | (35) | (87) |
Balance | 849 | 646 | 681 | 768
Balance, net of tax | $ 849 | $ 646 | $ 681 | $ 768

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