Retirement Plans and Other Retiree Benefits - Additional Information, U.S. Plans (Details) - Pension Plans - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Long-term rate of return on plan assets	6.30%
United States
Defined Benefit Plan Disclosure [Line Items]
Percentage of investments in Company's common stock	3.00%	5.00%
U.S. plans assets sold to Company (in shares)	588,334	384,004
U.S. plans assets purchased to Company (in shares)	0	0
Dividends received by plans on the Company’s common stock	$ 2	$ 3
Long-term rate of return on plan assets		6.60%