Commitments and Contingencies (Tables)

12 Months Ended

Sep. 30, 2019

Commitments and Contingencies Disclosure [Abstract]

Schedule of Change in Asset Retirement Obligation

Changes to the carrying amount of our asset retirement obligations were as follows:

Balance at 30 September 2017		$144.7
Additional accruals	43.8
Liabilities settled	(2.6		)
Accretion expense	7.2
Currency translation adjustment	(2.7		)
Balance at 30 September 2018		$190.4
Additional accruals	14.7
Liabilities settled	(2.1		)
Accretion expense	8.7
Currency translation adjustment	(3.5		)
Balance at 30 September 2019		$208.2

Schedule of Unconditional Purchase Obligations Disclosure

We are obligated to make future payments under unconditional purchase obligations as summarized below:

2020		$1,358
2021	407
2022	369
2023	349
2024	350
Thereafter	5,477
Total		$8,310