Income And Other Taxes (Remaining Tax Years Subject To Examination By Major Tax Jurisdiction) (Details)	12 Months Ended
	Dec. 31, 2024
Canada
Income and Other Taxes [Line Items]
Open tax years by major tax jurisdiction	2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
Kazakhstan
Income and Other Taxes [Line Items]
Open tax years by major tax jurisdiction	2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
Nigeria
Income and Other Taxes [Line Items]
Open tax years by major tax jurisdiction	2017 2018 2019 2020 2021 2022 2023 2024
Papua New Guinea
Income and Other Taxes [Line Items]
Open tax years by major tax jurisdiction	2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
United Arab Emirates
Income and Other Taxes [Line Items]
Open tax years by major tax jurisdiction	2024
United States
Income and Other Taxes [Line Items]
Open tax years by major tax jurisdiction	2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024