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Income Taxes - Deferred Income Tax Assets and Liabilities (Detail) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Deferred income tax assets    
Employee pensions and other liabilities $ 62 $ 63
Other balance sheet reserves and allowances 13 18
Operating lease liabilities 10 14
Tax loss and credit carryforwards 105 80
Deferred revenue 7 12
Intangibles and capitalized software 155 0
Total deferred income tax assets 352 187
Valuation allowance (51) (45)
Net deferred income tax assets 301 142
Deferred income tax liabilities    
Intangibles and capitalized software 0 8
Right of use assets - operating lease 9 13
Property and equipment 52 12
Other 25 28
Total deferred income tax liabilities 86 61
Total net deferred income tax assets $ 215 $ 81