Income Taxes - Deferred Taxes (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Deferred Tax [Line Items]
Deferred tax assets, intangibles transferred	$ 274
Deferred income tax assets
Employee pensions and other benefits	243	$ 223
Other balance sheet reserves and allowances	182	141
Tax loss and credit carryforwards	625	682
Capitalized research and development	47	53
Deferred Tax Assets, Lease Liabilities	104	0
Property, plant and equipment	11	11
Other	9	38
Total deferred income tax assets	1,348	1,148
Valuation allowance	(352)	(485)
Net deferred income tax assets	996	663
Deferred Tax Assets, Goodwill and Intangible Assets	127
Deferred income tax liabilities
Intangible Assets	0	(151)
Deferred Tax Liabilities, Deferred Expense, Taxable Distribution	102	0
Capitalized software	98	78
Other	0	7
Total deferred income tax liabilities	200	236
Total net deferred income tax assets	796	$ 427
U.S. federal and foreign tax attribute carryforwards	1,500
United States [Member]
Deferred income tax liabilities
Tax credit carryforward, amount	263
Tax credit carryforward, not subject to expiration	(5)
Tax credit carryforward, expires in years 2014 through 2032	$ 258