Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2018

Compensation And Retirement Disclosure [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						Nine Months Ended
	September 30						September 30
	2018			2017			2018			2017
Service cost	$	27.0		$	23.5		$	81.7		$	69.5
Interest on projected benefit obligation		21.3			20.5			64.3			60.9
Expected return on assets		(43.9	)		(40.1	)		(133.2	)		(119.5	)
Amortization of prior service costs		.3			.3			1.0			.9
Recognized actuarial loss		8.7			6.3			26.5			18.9
Net pension expense	$	13.4		$	10.5		$	40.3		$	30.7