Fair Value Measurements - Contingent Consideration (Details) - USD ($) $ in Millions		3 Months Ended	9 Months Ended
	Jul. 29, 2016	Sep. 30, 2019	Sep. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability, Estimate		$ 43	$ 43
Contingent Consideration basis		2,600
Liability [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability, Current		23	23
Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent Consideration basis			4,100
Paid [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent Consideration Commission payable		$ 20	$ 20
Lattice
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent Consideration	$ 60
Contingent Consideration Payment Period	4 years
Lattice | Contingent Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount Rate			11.40%