Pension and Postretirement Benefit Plans - Opening Paragraph Narrative (Details) - U.S. Defined Contribution Plan	3 Months Ended
	Mar. 31, 2016
Schedule Of Defined Contribution Plans Disclosures
Company match of eligible compensation, high end of range	5.00%
Company match of employee contribution, percent for employees hired on or after January 1, 2009	100.00%
Company contribution to employer retirement income account for employees hired on or after January 1, 2009	3.00%
Maximum
Schedule Of Defined Contribution Plans Disclosures
Employer match of employee contributions, pre January 1, 2009	60.00%
Minimum
Schedule Of Defined Contribution Plans Disclosures
Employer match of employee contributions, pre January 1, 2009	45.00%