Pension and Other Postretirement Benefit (Narrative) (Details) $ in Millions	6 Months Ended
Jun. 30, 2016 USD ($)
Compensation and Retirement Disclosure [Abstract]
Defined benefit plans, estimated benefit payments, in current fiscal year	$ 11.7
Estimated employer contributions in 2016	$ 14.2

Amount of employer's best estimate of contributions expected to be paid to the plan in the current remaining fiscal period.

No definition available.

Name:	us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInCurrentFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration