Pension and Postretirement Benefits (Plan Assets by Percentage Allocation) (Details)	Dec. 31, 2019	Dec. 31, 2018
United States | Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	57.00%
Pension Plan | United States | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	0.00%	0.00%
Plan assets, actual allocation (as a percent)	1.00%	1.00%
Pension Plan | United States | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	43.00%	43.00%
Plan assets, actual allocation (as a percent)	40.00%	43.00%
Pension Plan | United States | Global Equity
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	31.00%	30.00%
Plan assets, actual allocation (as a percent)	28.00%	30.00%
Pension Plan | United States | Global Real Assets
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	12.00%	13.00%
Plan assets, actual allocation (as a percent)	12.00%	13.00%
Pension Plan | United States | Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	57.00%	57.00%
Plan assets, actual allocation (as a percent)	59.00%	56.00%
Pension Plan | United States | Diversified Credit
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	12.00%	12.00%
Plan assets, actual allocation (as a percent)	12.00%	13.00%
Pension Plan | United States | Liability Driven Investment
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	45.00%	45.00%
Plan assets, actual allocation (as a percent)	47.00%	43.00%
Pension Plan | Foreign Plan | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	2.00%	7.00%
Plan assets, actual allocation (as a percent)	2.00%	7.00%
Pension Plan | Foreign Plan | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	2.00%	5.00%
Plan assets, actual allocation (as a percent)	2.00%	5.00%
Pension Plan | Foreign Plan | Global Equity
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	1.00%	2.00%
Plan assets, actual allocation (as a percent)	1.00%	2.00%
Pension Plan | Foreign Plan | North American Companies
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	1.00%	3.00%
Plan assets, actual allocation (as a percent)	1.00%	3.00%
Pension Plan | Foreign Plan | Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	50.00%	54.00%
Plan assets, actual allocation (as a percent)	50.00%	54.00%
Pension Plan | Foreign Plan | Liability Driven Investment
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	7.00%	9.00%
Plan assets, actual allocation (as a percent)	7.00%	9.00%
Pension Plan | Foreign Plan | U.K. Government Gilt Index
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	43.00%	43.00%
Plan assets, actual allocation (as a percent)	43.00%	43.00%
Pension Plan | Foreign Plan | Global Index Income Bond
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	0.00%	2.00%
Plan assets, actual allocation (as a percent)	0.00%	2.00%
Pension Plan | Foreign Plan | Other types
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	46.00%	34.00%
Plan assets, actual allocation (as a percent)	46.00%	34.00%
Pension Plan | Foreign Plan | Multi-Asset Category
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	19.00%	19.00%
Plan assets, actual allocation (as a percent)	19.00%	19.00%
Pension Plan | Foreign Plan | Buy-in Contracts
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	21.00%	10.00%
Plan assets, actual allocation (as a percent)	21.00%	10.00%
Pension Plan | Foreign Plan | Other
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	6.00%	5.00%
Plan assets, actual allocation (as a percent)	6.00%	5.00%