Employee Benefit Plans (Tables)

9 Months Ended

Dec. 01, 2018

Retirement Benefits [Abstract]

Schedule of Components of Net Pension and Post-retirement Expense

The following tables provide the components of net pension and post-retirement expense (in millions):

	12 weeks ended
	Pension						Other post-retirement benefits
	December 1, 2018			December 2, 2017			December 1, 2018			December 2, 2017
Estimated return on plan assets	$	(26.0	)	$	(27.6	)	$	—		$	—
Service cost	12.1			11.5			0.3			0.3
Interest cost	19.8			20.4			0.1			0.2
Amortization of prior service cost	—			—			0.8			0.8
Amortization of net actuarial (gain) loss	(1.4		)	0.1			(0.1		)	—
Net expense	$	4.5		$	4.4		$	1.1		$	1.3

	40 weeks ended
	Pension						Other post-retirement benefits
	December 1, 2018			December 2, 2017			December 1, 2018			December 2, 2017
Estimated return on plan assets	$	(86.6	)	$	(92.0	)	$	—		$	—
Service cost	40.3			38.3			0.8			0.8
Interest cost	66.0			67.9			0.4			0.7
Amortization of prior service cost	—			0.1			2.8			2.8
Amortization of net actuarial (gain) loss	(4.8		)	0.3			(0.2		)	—
Net expense	$	14.9		$	14.6		$	3.8		$	4.3