Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2017

Retirement Benefits [Abstract]

Components of Net Pension Expense

The following information details the components of net pension expense for the Company’s defined benefit plans:

	Three Months Ended June 30						Six Months Ended June 30
	2017			2016			2017			2016
Service cost	$	22.2		$	22.6		$	46.0		$	44.5
Interest on projected benefit obligation		20.0			24.1			40.4			47.7
Expected return on assets		(39.6	)		(36.1	)		(79.4	)		(71.7	)
Amortization of prior service costs		.3			.3			.6			.6
Recognized actuarial loss		5.9			7.4			12.6			13.9
Net pension expense	$	8.8		$	18.3		$	20.2		$	35.0