Restructuring Other Related Charges (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) Employee	Mar. 31, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Charges related to voluntary termination program	$ 15
Charges related to voluntary termination program, Expected Number of Positions Eliminated | Employee	400
Charges related to voluntary termination program, Number of Positions Eliminated | Employee	280
Michael K. Tucker [Member]
Restructuring Cost and Reserve [Line Items]
Other Nonrecurring Expense	$ 2
Mark J. Servodidio [Member]
Restructuring Cost and Reserve [Line Items]
Other Nonrecurring Expense		$ 3